.header {
    width: 100%;
    height: 100px;
    background: black;
}
.content{
    margin-left: auto;
    margin-right: auto;
    width: 900px;
    height: 750px;
    background-attachment: scroll;
    background-repeat: no-repeat;
    background-position: right center;
}
.button{
    width: 90px;
    color: #F9F9F9;
    font-family: Verdana, Arial, Helvetica, sans-serif;
    font-size: 12px;
    margin-left: 5px;
    margin-top: 30px;
    text-align: center;
    float: left;

}